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Tesla’s 4680 cell production process outlined in Giga Berlin’s revised filings
Tesla’s revised documents for Gigafactory Berlin have been posted online, and they are a treasure trove of information. The documents provided some new details about Tesla’s planned 4680 battery plant in Gigafactory Berlin, which Elon Musk noted is on track to be one of the world’s largest battery production facilities. They also outlined how Tesla’s 4680 cells are produced.
While sections of the filing pertaining to the planned 4680 battery cell plant in Giga Berlin were blacked out due to sensitive information that could not be made public, the documents show some important tidbits about the upcoming facility. This includes the facility’s cell production operations over four floors, with anode and cathode production on the first floor and tabless cell production on the third floor. The battery plant is massive, requiring large foundations similar to Gigafactory Berlin’s Phase 1 zone.
Anode and cathode production in the 1st floor pic.twitter.com/tOoV4b3Iur
— Tobias Lindh (@tobilindh) June 18, 2021
Most importantly, Tesla also submitted a simplified diagram of its 4680 battery cell production process, though most of the diagram was blacked out in the revised filing’s public release. However, the company provided a brief overview of how its new battery cell will be produced in the upcoming facility (roughly translated through Google Translate).
“The battery the Gigafactory Berlin requires special systems and process steps. The anodes and cathodes consist of coated current collector foils. Copper is used as the material for the anode foil and aluminum is used for the cathode foil. The anode and cathode components are manufactured in mixed processes (A020-01 and A020-02), which only use materials in powder form. The new materials used are tested and approved in our own laboratory (A020-11).
“In order for the powder coating to adhere to the two films, they must first be pre-coated with a thin layer of adhesive (substrate) (A020-03 and A020-04). This substrate is delivered in containers. The pre-coating is necessary because a dry coating with powder takes place. After the anode and cathode components have been mixed, they are applied as a coating to the respective substrate-coated film in order to establish electrical contact (A020-05 and A020-06). The current collector foils, coated with the anode or cathode components, result in the finished anode or cathode.
Page 239 pic.twitter.com/7gDk2fSeVy
— Giga Berlin / Gigafactory 4 (@gigafactory_4) June 18, 2021
The revised filings also provided a general idea of how Tesla’s tabless cell production works. Among these is the fact that the finished 4680 cells would be subjected to 10 days’ worth of curing after their formation.
“The anode or cathode is then cut to the required lengths with a laser in the “tabless process” (A020-08). The anode, the cathode and the separator are alternately placed one on top of the other and rolled up into a roll. This roller is then inserted into a metal housing, which is manufactured from steel rollers in a die-cutting and deep-drawing process (A020-07). In the assembly area, the final assembly and filling of the cell takes place with small amounts of electrolyte (approx. 10% of the cell weight) (A020-09).
“The electrolyte is absorbed by the electrode coatings and enables the lithium ions to move back and forth between the anode and cathode. The housing is then closed with a lid in a welding process. The last step is the formation (A020-10) of the cell. In the formation process, the cell is electrically started up by charging and discharging it under different temperature conditions. The finished cell remains in this area for approx. 10 days and is then put to further use. The cells produced are subjected to random quality control in our own laboratory (A020-11).”
A link to Tesla’s filings for Gigafactory Berlin could be found here.
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News
Tesla Sweden strikers see tax issues over IF Metall union error
To address the issue, IF Metall is encouraging Tesla strikers to return the refunded tax amounts to the union.
A tax correction is set to return two years of income tax payments to Tesla strikers in Sweden, after authorities determined that conflict compensation during a labor dispute should not have been taxed.
The issue is caused by a decision by IF Metall to treat strike compensation for Tesla workers as taxable income during the ongoing labor dispute with Tesla Sweden. That approach has now been reversed following guidance from the Swedish Tax Agency.
Strike compensation is typically tax-free under Sweden’s Income Tax Act, as noted in a report from Dagens Arbete (DA). However, two years ago, IF Metall’s board decided to classify payments to Tesla strikers as taxable.
“We did it to secure SGI, unemployment insurance and public pension. Those were the risks we saw when the strike had already dragged on,” Kent Bursjöö, financial manager at IF Metall, stated.
According to Bursjöö, the union wanted to ensure that members continued to register earned income with the tax agency, protecting benefits tied to income history. At the end of January, however, the Swedish Tax Agency informed the union that compensation during a labor dispute must be tax-free.
“Of course, we knew that it could be tax-free. But we clearly didn’t know that it couldn’t be taxable,” Bursjöö said.
Following discussions with auditors and tax authorities, IF Metall began correcting the payments. As a result, two years of paid income tax will now be credited back to the affected strikers’ tax accounts. The union will also recover previously paid employer contributions.
However, the correction creates secondary effects. Since the payments will now be treated as tax-free, pension contributions tied to those earnings will be withdrawn, potentially affecting state pension accrual and income-based benefits such as parental or sickness benefits.
To address this, IF Metall is encouraging members to return the refunded tax amounts to the union. In exchange, the union plans to pay 18.5% into occupational pensions on their behalf. “Otherwise, it will be a form of overcompensation when they get the tax paid back,” Bursjöö said.
That being said, the IF Metall officer acknowledged that the union’s legal ability to reclaim the funds from its improperly paid Tesla Sweden strikers is limited. “The legal possibilities are probably limited, from what we can see. But we assume that most people see the value of securing their pension,” Bursjöö said.
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Tesla sues California DMV over Autopilot and FSD advertising ruling
The complaint seeks to remove the agency’s conclusion that Tesla falsely promoted the capabilities of Autopilot and Full Self-Driving.
Tesla has filed a lawsuit against the California Department of Motor Vehicles (DMV) in an effort to overturn a prior ruling that found the automaker engaged in false advertising related to its driver-assistance systems.
The complaint seeks to remove the agency’s conclusion that Tesla misled customers about the capabilities of Autopilot and Full Self-Driving.
Tesla’s legal action follows a decision by California’s Office of Administrative Hearings (OAH), which concluded that Tesla’s earlier marketing of “Autopilot” and “Full Self-Driving” violated state law, as noted in a CNBC report.
While the DMV opted not to suspend Tesla’s license after determining the company had updated its marketing language for its advanced driver-assistance systems, Tesla is asking the court to go further and reverse the agency’s conclusion.
In its Feb. 13 complaint, Tesla’s attorneys argued that the DMV “wrongfully and baselessly” labeled the company a “false advertiser” for its Autopilot and FSD systems. The filing argued that regulators failed to demonstrate that consumers were actually misled about the capabilities of Tesla’s systems.
According to Tesla’s complaint, the DMV “never proved consumers in the state had been confused about whether its cars were safe to drive without a human at the wheel.”
Tesla’s legal team further stated: “It was impossible to buy a Tesla equipped with either Autopilot or Full Self-Driving Capability, or to use any of their associated features, without seeing clear and repeated statements that they do not make the vehicle autonomous.”
Tesla now promotes its driver-assistance system as “Full Self-Driving (Supervised),” a name that overemphasizes the need for active driver attention.
Tesla’s autonomous driving program is a pivotal part of the company’s future, with CEO Elon Musk stating that self-driving technology will truly be the solution that will push Tesla into its full potential. The company is currently operating a Robotaxi pilot in Austin and the Bay Area, and the company recently announced that it has produced the first Cybercab from Giga Texas’ production line.
News
Tesla is making two big upgrades to the Model 3, coding shows
According to coding found in the European and Chinese configurators, Tesla is planning to make two big upgrades: Black Headliner offerings and a new 16-inch QHD display, similar to that on the Model Y Performance.
Tesla is making two big upgrades to the Model 3, one of which is widely requested by owners and fans, and another that it has already started to make on some trim levels of other models within the lineup.
The changes appear to be taking effect in the European and Chinese markets, but these are expected to come to the United States based on what Tesla has done with the Model Y.
According to coding found in the European and Chinese configurators, Tesla is planning to make two big upgrades: Black Headliner offerings and a new 16-inch QHD display, similar to that on the Model Y Performance.
These changes in the coding were spotted by X user BERKANT, who shared the findings on the social media platform this morning:
🚨 Model 3 changes spotted in Tesla backend
• New interior code: IN3PB (Interior 3 Premium Black)
• Linked to Alcantara-style black headliner
• Mapped to 2026 Model 3 Performance and Premium VINs• EPC now shows: “Display_16_QHD”
• Multiple 2026 builds marked with… pic.twitter.com/OkDM5EdbTu— BERKANT (@Tesla_NL_TR) February 23, 2026
It appears these new upgrades will roll out with the Model 3 Performance and Tesla’s Premium trim levels of the all-electric sedan.
The changes are welcome. Tesla fans have been requesting that its Model 3 and Model Y offerings receive a black headliner, as even with the black interior options, the headliner is grey.
Tesla recently upgraded Model Y vehicles to this black headliner option, even in the United States, so it seems as if the Model 3 will get the same treatment as it appears to be getting in the Eastern hemisphere.
Tesla has been basically accentuating the Model 3 and Model Y with small upgrades that owners have been wanting, and it has been a focal point of the company’s future plans as it phases out other vehicles like the Model S and Model X.
Additionally, Tesla offered an excellent 0.99% APR last week on the Model 3, hoping to push more units out the door to support a strong Q1 delivery figure at the beginning of April.
Tesla Sweden strikers see tax issues over IF Metall union error
Tesla sues California DMV over Autopilot and FSD advertising ruling
